/** 
 *  
 * jQuery scrollQ plugin li上下滚动插件
 * @name jquery-scrollQ.js 
 * @author Q 
 * @date 2012-03-23 
 * line 显示li行数 
 * scrollNum 每次滚动li行数
 * scrollTime 滚动速度 单位毫秒
 * 
 */  
(function($){  
    var status = false;  
    $.fn.scrollQ = function(options){  
        var defaults = {  
            line:7,  
            scrollNum:3,  
            scrollTime:3000
        }
		var options=jQuery.extend(defaults,options);
		var _self = this;
		return this.each(function(){  
			$("li",this).each(function(){
				$(this).css("display","none");
			})
			$("li:lt("+options.line+")",this).each(function(){
				$(this).css("display","block");
			})
			function scroll() {
				for(i=0;i<options.scrollNum;i++) {
					var start=$("li:first",_self);
					start.fadeOut(100);
					start.css("display","none");
					start.appendTo(_self);
					$("li:eq("+(options.line-1)+")",_self).each(function(){
						$(this).fadeIn(500);
						$(this).css("display","block");
					})
				}
			}
			var timer;
			timer = setInterval(scroll,options.scrollTime);
			_self.bind("mouseover",function(){
				clearInterval(timer);
			});
			_self.bind("mouseout",function(){
				timer = setInterval(scroll,options.scrollTime);
			});
			
		});
    }
})(jQuery); 